Effect of initial temperature and H2 addition on explosion characteristics of H2-poor/CH4/air mixtures

被引：69

作者：

Li, Ruikang ^{[1
]}

Luo, Zhenmin ^{[1
,2
]}

Wang, Tao ^{[1
,2
,3
]}

Cheng, Fangming ^{[1
,2
]}

Lin, Haifei ^{[1
,2
]}

Zhu, Xiaochun ^{[1
]}

机构：

[1] Xian Univ Sci & Technol, Coll Safety Sci & Engn, 58 Yanta Mid Rd, Xian 710054, Shaanxi, Peoples R China

[2] Shaanxi Key Lab Prevent & Control Coal Fire, 58 Yanta Mid Rd, Xian 710054, Shaanxi, Peoples R China

[3] Xian Univ Sci & Technol, Postdoctoral Program, 58 Yanta Mid Rd, Xian 710054, Shaanxi, Peoples R China

来源：

ENERGY | 2020年 / 213卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Temperature dependence; Explosion characteristics; CH4/H2-poor/air mixture; Heat loss; Temperature sensitivity analysis; Rate of production; UPPER FLAMMABILITY LIMIT; PREMIXED FLAME PROPAGATION; LAMINAR BURNING VELOCITY; ELEVATED PRESSURES; HYDROGEN ADDITION; METHANE/AIR MIXTURE; AIR MIXTURES; COMBUSTION CHARACTERISTICS; NO FORMATION; BEHAVIOR;

D O I：

10.1016/j.energy.2020.118979

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

To investigate the temperature dependence of H-2-poor/CH4/air mixtures explosions, the corresponding explosion characteristics are studied by experimental and numerical methods. The explosion pressure history and flame propagating are obtained using a 20 L spherical tank and a high-speed camera. The heat loss is calculated and the temperature sensitivity and the rate of production are analysed engaged in the GRI-mech 3.0 mechanism. Results showed that the addition of H-2 has the highest improvement in the explosion characteristics of 7 vol% CH4 mixtures. The effect on the explosion is mainly reflected in the flame speed and explosion time caused by the changes in heat loss. As the initial temperature increase, the most positive and negative reaction on the temperature sensitivity is R38 and R158, respectively. After H-2 addition, the overall sensitivity is reduced and the dominant role of R38 is more prominent. Based on the ROP development, the whole reaction is divided into 4 stages: reaction acceleration, extreme reaction, intermediate species conversion, and reaction termination. Moreover, R38 is the most promoted and dominant reaction for ROP of O-2 and OH. R84 is the most inhibit reaction of H-2 oxidation and has a great influence on the ROP of OH. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：11

共 73 条

[1] Experimental investigation on using ionic liquid to control spontaneous combustion of lignite [J].